High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Abandoned railway line circling the city of Paris.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A dilapidated dock tells the story of Titanic's missed arrival.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Where America's first doomsday cult awaited the end of the world.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned stretch of highway, deteriorating next to the operational one.

The first declared National Monument in the United States.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A snapshot of the city's fascinating voodoo culture.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

A seemingly endless landscape of pure salt stretches far across Bolivia.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

Remnants of a storybook amusement park hidden behind a strip mall.

A crumbling hospital from the 1850s on Roosevelt Island.

An artsy hidden staircase leads to breathtaking views of San Francisco.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.